<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
		.box{
			width: 400px;
			height: 400px;
			background: #fff url(./diwen.png) 0 0 no-repeat;
			border: 1px solid red;
			/*background-position: center;*/
			background-size: cover;
			/*背景尺寸：：实现模糊效果*/
		}
	</style>
</head>
<body>
	<div class="box">
		
	</div>
</body>
</html>